RibbonApplicationMenu: getting rid of the AuxiliaryPane

Question

It so happened that the application I\'m working on doesn\'t operate on documents, so there\'s no need in displaying the recently opened documents list in the application me

Answer 1

I know this has been a while, but I've got another solution to this. This one does not provide the Popup width property, instead a ShowAuxilaryPanel boolean. It then goes to Bind the width of the Popup, to the width of the menu item area of the menu.

public class SlimRibbonApplicationMenu : RibbonApplicationMenu
{
    public bool ShowAuxilaryPanel
    {
        get { return (bool)GetValue(ShowAuxilaryPanelProperty); }
        set { SetValue(ShowAuxilaryPanelProperty, value); }
    }

    public static readonly DependencyProperty ShowAuxilaryPanelProperty =
        DependencyProperty.Register("ShowAuxilaryPanel", typeof(bool),
        typeof(SlimRibbonApplicationMenu), new UIPropertyMetadata(true));

    public override void OnApplyTemplate()
    {
        base.OnApplyTemplate();
        this.DropDownOpened += SlimRibbonApplicationMenu_DropDownOpened;
    }

    void SlimRibbonApplicationMenu_DropDownOpened(object sender, EventArgs e)
    {
        DependencyObject popupObj = base.GetTemplateChild("PART_Popup");
        Popup panel = (Popup)popupObj;
        var exp = panel.GetBindingExpression(Popup.WidthProperty);

        if (!this.ShowAuxilaryPanel && exp == null)
        {
            DependencyObject panelArea = base.GetTemplateChild("PART_SubMenuScrollViewer");

            var panelBinding = new Binding("ActualWidth")
            {
                Source = panelArea,
                Mode = BindingMode.OneWay
            };
            panel.SetBinding(Popup.WidthProperty, panelBinding);
        }
        else if (this.ShowAuxilaryPanel && exp != null)
        {
            BindingOperations.ClearBinding(panel, Popup.WidthProperty);
        }
    }
}